self::ietf:e1 or (parent::ietf:e1 and not(self::text() or self::e2)) or count(id("E3")|ancestor-or-self::node()) = count(ancestor-or-self::node())LBXEYs7t/d8bgcN54PAfey3vjzA=aqkAIl/Sds+oXb6U47i139nlSQM=